chore(demo): new example improvements (#1100)

Resolving issues in Navigation > Behaviors > New

- Removed unneeded delays in behaviors
- improved target of modal example
- improved description

| Before | After |
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![before](https://github.com/user-attachments/assets/af7c4ebe-2360-442f-a914-c30d50ee6a64)
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![after](https://github.com/user-attachments/assets/4e6953c4-c14a-4075-b7ec-e9c68ca92896)
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[Asana](https://app.asana.com/0/1204008699308084/1209182447962507)

demo/backend/navigation/behaviors/actions/new/index.xml.njk

@@ -31,19 +31,20 @@ hv_button_behavior: "back"
 {% endblock %}
 
 {% block content %}
-  {{ description('Tapping the button below will request an XML screen and show it in a new modal.') }}
+  {{ description('Tapping the button below will open a screen in a modal.') }}
 
   {% call button('New') -%}
-    <behavior action="new" href="/hyperview/public/navigation/behaviors/actions/modal/index.xml" />
+    <behavior action="new" href="/hyperview/public/navigation/behaviors/actions/new/modal.xml" />
   {%- endcall %}
 
   {% call button('New with indicator') -%}
-    <behavior action="new" delay="1000" href="/hyperview/public/navigation/behaviors/actions/modal/index.xml" show-during-load="loading-screen" />
+    <behavior action="new" href="/hyperview/public/navigation/behaviors/actions/new/modal.xml" show-during-load="loading-screen" />
   {%- endcall %}
 
+  {{ description('Tapping the button below will open a modal with query params from the form.') }}
   <form>
     {% call button('New with params') -%}
-      <behavior action="new" delay="1000" href="/hyperview/public/navigation/behaviors/actions/modal/index.xml" show-during-load="loading-screen" />
+      <behavior action="new" href="/hyperview/public/navigation/behaviors/actions/new/modal.xml" show-during-load="loading-screen" />
     {%- endcall %}
     <text-field style="input" name="param1" value="value1"/>
   </form>

demo/backend/navigation/behaviors/actions/new/modal.xml.njk

@@ -0,0 +1,11 @@
+---
+permalink: "/navigation/behaviors/actions/new/modal.xml"
+hv_title: "Modal Screen"
+hv_button_behavior: "close"
+---
+{% extends 'templates/scrollview.xml.njk' %}
+{% from 'macros/description/index.xml.njk' import description %}
+
+{% block content %}
+  {{ description('This screen was dynamically opened as a modal.') }}
+{% endblock %}